#include <bits/stdc++.h>

using namespace std;

int main(void) {
  int n;
  cin >> n;

  vector<string> s(n), t(n);
  for (int i = 0; i < n; i++) {
    cin >> s[i];
  }
  for (int i = 0; i < n; i++) {
    cin >> t[i];
  }

  for (int i = 0; i < n; i++) {
    if (s[i] == t[i]) continue;
    cout << i + 1 << endl;
    cout << s[i] << endl;
    cout << t[i] << endl;
  }

  return 0;
}